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The Integumentary System

The Integumentary System. What is the Integumentary System?. It protects the body from injury and pathogens It regulates body temperature It eliminates waste through perspiration It contains nerve endings for cold, heat, pain, pressure, and vitamins It stores fat and vitamins What is it?

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The Integumentary System

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  1. The Integumentary System

  2. What is the Integumentary System? • It protects the body from injury and pathogens • It regulates body temperature • It eliminates waste through perspiration • It contains nerve endings for cold, heat, pain, pressure, and vitamins • It stores fat and vitamins What is it? THE SKIN! (The largest organ in your body) Don’t forget this system also includes your hair and nails!

  3. Integumentary System Integument means ‘covering’ Integumentary system covers body (skin)

  4. Review Homeostasis Definition: • The tendency toward a relatively stable equilibrium

  5. Homeostasis and the Integumentary System Normal body temperature Change in temperature Normal body temperature

  6. How does the integumentary system respond to changes? • Increase in body temp. (hotter) • Vessels in skin will dilate (get bigger) • Sweat • Decrease in body temp. (colder) • Vessels in skin will constrict (get smaller)

  7. Structure

  8. Epidermis • Most superficial layer of skin made up of many layers of tightly packed cells • Form an impermeable layer • Acts as a barrier against bacteria and viruses

  9. Dermis • Deep layer of skin • Most complex layer • Location of sweat glands, hair follicles, nerve fibers, and many blood vessels*

  10. Hypodermis • Largely made of adipose tissue (fat) • This layer also contains blood vessels and nerves

  11. Homeostatic Imbalances of Skin • Athletes foot – caused by a fungus, involves toes and soles of feet • Boils – caused by bacteria entering hair follicles or sebaceous glands • Eczema – red itchy areas of surface of skin

  12. Homeostatic Imbalances of Skin • Skin cancer • Pressure sores – caused by poor circulation resulting from pressure that destroys skin and creates ulcer

  13. Homeostatic Imbalances of Skin • Shingles – skin eruption due to viral infection • Gangrene – necrosis of tissue cells due to blockage of blood supply to an area, or blockage from disease or direct injury • Dermatitis – inflammation of skin (type of eczema)

  14. Homeostatic Imbalances of Skin • Tears – due to fragile skin • Warts – viral infection of skin • Burns – first, second, or third degree, depending on amount of skin tissue destroyed • Bruising – due to fragile skin and/or effects of medications

  15. Observations of the Integumentary System to Report • Breaks • Rash • Complaint of itching • Black and blue areas • Redness • Ulcers, sores, or drainage

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